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Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_5596_Библиотеки_им_академика_М_И_Перельмана

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β- Carbolines
SCHEME 1.45 Synthesis of β- carboline based chalcones.
SCHEME 1.46 Synthesis of β- carboline- 4- benzylidene- 4H- oxazol- 5- one hybrids.
free indole NH group is crucial for anticancer action. All cancer cell lines were pos­sibly responsive to the synthesized compounds in a dose- dependent way. The fabrica­tion of hybrids of β- carboline- 4- benzylidene- 4H- oxazol- 5- one was reported by Savariz et al., who also assessed their anticancer effectiveness (Savariz et al. 2012). Compound 157 was hydrolyzed by sodium carbonate under reux in methanol/ water, and with subsequent acid hydrolysis, compound 158 was produced, which underwent an Erlenmeyer- Plochl reaction with benzaldehyde to get the desired product, β- carboline- 3- oxazolone motifs 159 (Scheme 1.46). Using doxorubicin as the refer- ence medication, all prepared series of compound 159 were tested for cytotoxicity against a panel of cancer cell lines. A SAR investigation revealed that the cytotoxic potential of β- carboline- oxazolone hybrids was boosted by electron- donating sub­stituent at the C1 position. The most effective molecule was discovered to have a
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β- Carbolines as Anti-Cancer Agents
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SCHEME 1.47 Synthesis of 9- substituted β- carbolines.
4- methoxyphenyl ring at the C1 position and a phenyl ring on oxazolone, with IC50 values against the U251, PC- 3, and OVCAR- O3 cancer cell lines of 0.48, 1.50, and
1.07 μM, respectively.
According to a report by Cao et al. on the synthesis of 9- substituted β- carboline motifs 160 through the reaction of 148 with sodium hydroxide (Scheme 1.47), harmines afnity for binding to DNA could be increased by adding a suitable sub­stituent to its N- 9 position, which in turn increases Topo I inhibition.When electron­releasing substituents were applied, such compounds started to exhibit improved cleavage efciency. For instance, a molecule with an n- butyl substituent at the N- 9 position demonstrated the strongest anticancer action, with an IC50 value of 11.0 μM against Lovo.
Alkyl linked bivalent β- carboline motifs were synthesized, and their biological evaluation was published by Chen et al. Compound 161 produces the Schiff’s base when combined with the appropriate sym- diamines, and when this base is reduced with NaBH3CN, the required compound 162 is produced (Scheme 1.48). Using Endostar as the standard reference, the capacity to suppress these drugs was assessed against the human umbilical vein cancer cell line EAHY26. The ndings revealed striking antiproliferative actions, and some drugs displayed IC50 values between 2.16 and 5.0 μM. The vascular targets of anticancer medication are affected by these biva­lent β- carboline motifs (Chen et al. 2016).
Gu et al. also described the synthesis of a number of bivalent β- carboxyline motifs that were tested against a variety of cancer cell lines, including BGC- 823, A- 375, P- 769, and SK- OV- 3. In order to create symmetrical bivalent β- carboline motifs 164, a monovalent β- carboline- 3- carboxylic acid 163 was combined with the appro­priate dibromoalkane in anhydrous DMF (Gu et al. 2018) (Scheme 1.49). Compound 164 with the highest potential was found to exhibit a 64.2% inhibition rate against Lewis lung carcinoma in mice. At a dose of 26.9 mmol/ kg, a compound with a 3- phenylpropyl group at the C- 9 position of the β- carboline ring inhibited Lewis lung cancer in mice with a rate of 53.5%.
The preparation of simple dimeric β- carboline motifs and assessment of their cyto­toxic potential against various cancer cell lines were both attested by Chatwichien
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β- Carbolines
SCHEME 1.48 Synthesis of alkyl linked bivalent β- carbolines.
et al. Condensation of 1- formyl- β- carboline 165 with linkers was used to create dimers of β- carboline motifs, which were then reduced with sodium cyanoborohydride to produce 166 and 167 (Scheme 1.50). According to studies, dimers are more effective than monomers against the cancer cell lines H1299 and A375, with IC50 values of 1.6 and 2.0 μM, respectively (Chatwichien et al. 2015).
Sun et al. described the preparation of piperazine- linked β- carboline, which has superior antitumor activity and an improved solubility prole (Sun et al. 2015). In the synthesis, compound 163 and piperazine were stirred in the presence of anhydrous dichloromethane at 60 °C, and the desired compound 168 was then produced by fur­ther reducing anhydrous dichloromethane with NaBH3 at room temperature (Scheme
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β- Carbolines as Anti-Cancer Agents
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SCHEME 1.49 Synthesis of bivalent β- carbolines.
1.51). Utilizing cisplatin as the standard reference, the anticancer activity of each of the synthesized bivalent β- carboline motifs 168 was assessed against a variety of cancer cell lines. The C1 and C9 positions of β- carbolines were signicantly more important in the SAR study’s demonstration of their contribution to anticancer action. The cytotoxic potential of β- carboline motifs was improved by adding an alkyl group at the C9 position; the tert- butyl substituent was thought to be the best. With IC50 values of 7.62, 8.95, 5.32, 3.02, 8.35, 5.51, 7.62, and 5.5 μM against MCF- 7, HepG2, 22RV1, 769- P, A- 375, SK- OV- 3, BCG- 823, and LLC cancer cell lines, respectively, the most potent cytotoxic molecule was examined.
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β- Carbolines
SCHEME 1.50 Synthesis of dimeric β- carbolines.
SCHEME 1.51 Synthesis of piperazine- linked bivalent β- carbolines.
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β- Carbolines as Anti-Cancer Agents
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SCHEME 1.52 Synthesis of 1,2,3- trazole- tethered β- carbolines hybrids.
Salehi et al. described a methodical approach to the systematic preparation of H- 1, 2, 3- triazole- tethered- β- carboline hybrids and assessed their potential for anticancer action (Salehi et al. 2016). The intended 1H- 1,2,3- trizoletethered β- carboline hybrid 171 was produced by treating the o- propargylated β- carbolines 169 with a number of alkyl/ aryl azides 170 by a Cu- promoted azidealkyne cycloaddition reaction (Scheme 1.52).
Using paclitaxel as a positive control, all the prepared compounds were tested against cancer cell lines. The most effective molecule out of these 171 was discovered to contain a fragment of 3,4- dichlorophenyl as azide, which had an IC50 value of 46 and 32 μM against the HeLa and HepG2 cancer cell lines, respectively.
Drug resistance is brought on by the efux of medicines from cancer cells by the breast cell resistance protein (ABCG2/ BRCP1). Spindler et al. developed ABCG2/ BRCP1 as a result to prevent this outow (Spindler et al. 2016). Using the Pictet– Spengler method, tryptamine or 5- hydroxytryptamine 172 reacts with various aldehydes 173 in the presence of dichloromethane and TFA to yield 1- substituted tertahydro- β- carbolines or 1,6- disubstituted tetrahydro- β- carbolines 174. These sub- sequently react with substituted benzoyl chloride 175 using THF and TEA, yielding Tetrahydro- β- carbolines replaced with N- 2- acyl- 1 or N- 2- acyl- 1,6- disubstituted with N- 2- acyl- 1 176 (Scheme 1.53).
Similar to Ko143 in terms of inhibitory activity, two compounds prefer BRCP1/ ABCG2 over ABCB1 over ABCB1. The drugs also reversed SN- 38 resistance
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SCHEME 1.53 Synthesis of N- 2- acyl- 1,6- disubstituted tetrahydro- β- carbolines.
β- Carbolines
mediated by BRCP1/ ABCG2, but the effect of Ko143 was less effective. The sample showed separate membranes with basal ATPase activity from Spodoptera frugiperda ovarian cells (Sf9) infected with a recombinant baculovirus expressing ABCG2/ BRCP1.
1. 4 CONCLUSIONS AND FUTURE PERSPECTIVES
Cancer has emerged as one of the leading causes mortalities worldwide. Various treatment modalities, such as chemotherapy, radiation therapy, and sometimes sur­gery, are employed to control the disease, depending on its type and severity. Despite a great deal of unneeded investigation that has been performed in the medical eld, there are still numerous areas wherein researchers can make improvements to address this troubling clinical issue. For cancer treatments, combination therapy has become popular since it prevents resistance from growing and outperforms single agents in terms of effectiveness. Eliminating cancer progenitor cells should be the next step in the ght against cancer because they often exhibit drug resistance and have the potential to induce remission. Research needs to be done in this area in order to comprehend the basic mechanisms underlying cancer medication resistance and to identify drugs that can treat tumors without running the risk of developing resistance. In the interim, several novel approaches can be further investigated using currently available drugs. There are now a number of studies being published on the usage of β- carboline derivatives as possible cancer therapies. This chapter outlined the bio­logical evaluation and synthesis of many β- carboline- based compounds, grouping them depending on the expected activities. According to observations collected, the approach employed in the referenced publications to analyze the anticancer effects against different cancer cell lines primarily involved molecular docking analysis. The interactions between anticancer motifs and cancer cells were also examined using contemporary techniques including UV- Vis study. There is potential for more research on cancer treatments using cutting- edge spectroscopic investigations to comprehend how the drugs function on target cells.
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β- Carbolines as Anti-Cancer Agents
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